The method of purification of crude methanol from iron compounds

 

(57) Abstract:

Usage: in the field of chemical technology of organic synthesis. The product is methanol. B. F. CH4O the Content of iron compounds 0,16-0,8510-5wt.% . Reagent 1: methanol raw content of iron compounds 810-4wt.% Cleaning requirements: reagent 1 is maintained at 95 to 135C. and an elevated pressure of 0.45 - 1.3 MPa and filtered. table 2., 1 Il.

The invention relates to chemical technology of organic synthesis, specifically to an improved method of purification of crude methanol used for the synthesis of formaldehyde.

It is known that the majority of the world production of methanol used for the synthesis of formaldehyde. However, methanol is a raw, obtained from units for methanol synthesis, cannot be sent directly to the synthesis of formaldehyde, as it contains a number of impurities, which are catalytic poison for silver catalyst for the oxidative dehydrogenation of methanol. The main catalytic poison in methanol raw are iron compounds (CARBONYLS, chlorides, nitrogen-containing), a special place among them is volatile PENTACARBONYL iron. It is the presence of these sadatomo in practice methanol raw purified multistage rectification (1).

A known method of purification of crude methanol from contact poisons, which at the first stage, the methanol-raw cleanse from boiling components by Stripping the last purge gases methanol or carbon dioxide, or air, and the second stage is treated with methanol raw solution of potassium permanganate (2,3). The disadvantages of this method of purification of crude methanol are:

a relatively low degree of purification of the crude methanol from iron compounds, approximately 90%;

high additional operating costs and capital expenditures;

the possibility of using this method of cleaning only the combined production of methanol-formaldehyde.

A known method of purification of crude methanol from contact poisons, which consists in the fact that a pair of methanol is mixed with air and the temperature 180-370aboutTo pass through the oxide tungsten-molybdenum-vanadium catalyst promoted with potassium permanganate (4).

The disadvantage of this method of purification of crude methanol is that the cleaning process is directly combined with the process of obtaining formaldehyde and water content in spirtovodnogo mixture over 17% of the observed decline in the activity of the oxide catalysis is of silver contacts, and as a consequence, the reduction of the yield of formaldehyde. In addition, the high temperature spirtovodochnoj mixture (180-370about) at the entrance to the contact device of the synthesis of formaldehyde dramatically reduces the conversion of methanol.

A known method of purification of technical methanol (methanol-rectified) with the use of ion exchange resins, namely, that rectified methanol is sequentially passed through a cation exchange resin KU-2 and anionite AV-16 or AB-17, or EDE-10P with a bulk velocity up to 10 h-1when 10-40about(5).

A significant drawback of this method is that it is designed for the purification of methanol-rectified, i.e. methanol in which the contact poisons are present in minimum quantities. For the purification of crude methanol according to the method requires substantial volumetric capacity of the ion exchanger. The disadvantage of this method include the relatively low degree of purification from iron compounds, which does not exceed 86%.

A known method of purification of the methanol used in the production of formaldehyde, which provides for the purification of methanol entering the synthesis of formaldehyde from metal ions by a preliminary distillation of methanol and then passing through katika known method all noted in the analysis of the method (5) disadvantages because this solution is also aimed at the purification of the methanol-rectified.

The closest in technical essence and the achieved effect to the proposed method is the method of purification of crude methanol from contact poisons, which provides for the stage of incubation of the crude methanol for 1-8 hours at 65-90aboutC, followed by passing it through a cation exchange resin KU-2 with a bulk velocity of 1-3 h-1(7, prototype). The method allows to achieve a high degree of purification of crude methanol (99%) of the volatile compounds of iron, however, requires frequent replacement of the cation, because of the rapid depletion of its sorption capacity. Leakage of soluble iron compounds through the cation leads to the fact that the iron hits the silver catalyst process of formaldehyde and does not allow to reach a satisfactory time mezhregionalnogo cycle of his work.

The aim of the invention is to develop a method of exhaustive purification of crude methanol from iron compounds that significantly increase the time mezhregionalnogo mileage silver catalyst for the synthesis of formaldehyde and significantly increase the yield of formaldehyde.

The goal of DOS is Mr. a pressure of 0.4-1.3 MPa for 2-4 h and then filtered in a known manner.

Comparative analysis of the proposed technical solution the technical solution adopted for the prototype shows that the inventive method is cleaning conditions, namely temperature, increased pressure, and replacing the node sorption on cation exchanger, filtration. All this allows to make a conclusion on the conformity of the proposed method the criteria of the invention is a "novelty."

Known literature data and the results of their research show that the chemistry of decomposition of PENTACARBONYL iron when heated in methanol has a complex multivariate nature. As the main stages of this process are the following:

at a temperature of more than 60aboutFrom start to flow the decomposition reaction with the release of highly radioactive atomic iron

Fe(CO)5->> Fe* + 5CO

at a temperature of approximately 75aboutSince the reaction takes place education insoluble in methanol, and other solvents Lewis - noncarbonyl iron

2Fe(CO)5->> Fe2(CO)9+CO, which when further heated in methanol (90about(C) enters crystalline dodecanoyl iron

2Fe2(CO)9->> Fe3(CO)12+5Fe(CO)3OH [Fe(CH3OH)n-2]

[Fe3H(CO)12]2+ 10Fe(CO)5+ Fe(OCH3)2< / BR>
In addition to these reactions should be kept in mind the possibility of occurrence of various interactions of highly reactive atomic iron, as well as the interaction of PENTACARBONYL iron with various amino compounds, which are located in methanol raw in the form of particles (8). As a result of such reactions are formed of different soluble in methanol complex compounds of iron, which can get on the silver contact in the process of producing formaldehyde and to poison him.

It is due to chemical transformations, the main method of purification of crude methanol in the vast majority of known technical solutions, is compulsory distillation of crude methanol and further sorption purification from soluble in methanol traces of iron compounds on ion-exchange resins (4-6). Also is obvious that this method does not always lead to a comprehensive cleaning of methanol due to the limited sorption capacity of the resin and determines the need for constant replacement and regeneration of the resin.

During the experiments, the authors found an unexpected effect is more degrees and keep it at high pressure up to 1.3 MPa for 2-4 h, it is the agglomeration of iron compounds in the particles, the size of which allows for their removal from methanol to use filtering. Subsequent analysis of the filtrate by spectrophotometry show the presence of iron compounds in methanol raw in trace quantities (see examples 1-4 of table. 1).

This method of purification of crude methanol from iron compounds unknown in the prior art, and therefore, it can be argued that the proposed solution meets the criteria of the invention "inventive step".

As a result of implementing the proposed method of purification of crude methanol from iron compounds is achieved by the following technical and socio-economic effects;

the method allows purification of the crude methanol from the volatile iron compounds to values that exceed the rate of the standard for methanol-rectified highest quality;

to simplify technology for the purification of methanol used in the synthesis of formaldehyde, due to the exclusion of the site rectification and reduce energy costs;

it is possible to completely abandon the use of expensive ion-exchangers, and accordingly, the stage of their reg is socialnet process for the synthesis of formaldehyde, by increasing the time mezhregionalnogo mileage silver catalyst (see table. 2).

The proposed method of purification of crude methanol from iron compounds is as follows (see drawing). Methanol raw pump N-1 served in the heat recovery heat exchanger T-1 for preheating, and then heated in the heater T-2 to 95-135aboutWith and kept in a temperature-controlled tank E-1 for 2-4 h under a pressure of 0.4-1.3 MPa. Next, methanol is a raw cooled in the recuperator T-1 and is passed through the filter to clean it from loose agglomerates of insoluble iron compounds.

All of the examples used methanol raw, with the following characteristics, wt.%: The methanol content of 91.3 water Content of 6.2

The content of dimethy - ash ether 2,1

The content of higher alcohols 0,3

Content Aldagi Dov and ketones 0,1

The content of iron compounds: General 8,1 10-4volatile 5,9 10-4< / BR>
The purified methanol raw analyzed for the content of iron compounds according to GOST 25742. -85.

Then the purified methanol raw used as raw materials in the process of oxidative dehydrogenation of methanol to formaldehyde.

Conditions providenceavenue to oxidize the aspects of the dehydrogenation 65 wt.%

The load on catalysis - tor 120 CLO3HE

cm-2h-1< / BR>
The cross-sectional area of the reactor 2.0 cm2< / BR>
Catalyst - kristalli - ical silver, fraction of 1.5-2.0 mm thick layer of catalyst 35 mm process Temperature 670-690aboutWITH

The effectiveness of the proposed method of purification of crude methanol from iron compounds is illustrated by the following examples:

P R I m e R 1. Methanol raw composition, wt.%: methanol 91,3; water 6,2; dimethyl ether 2,1; higher alcohols 0,3; aldehydes and ketones 0,1; compounds of iron 8,1 10-4(including volatile compounds of iron 5,9 10-4), the pump sequentially fed through the heat recovery heat exchanger (tube space), heater, thermostatic capacity, heat recovery exchanger (annulus) and the filter. Methanol raw aged in temperature-controlled tanks at a temperature of 135aboutC and a pressure of 1.3 MPa for 2 h (the aging time and the pressure is determined by the supply pump). In a purified methanol contains 0,18 10-5wt.% iron compounds, of which volatile compounds of iron are trace amounts (conditions for purification of crude methanol and the results are shown in table. 1.).

-5wt.%).

P R I m e R 2-9. Experiments are performed as in example 1, varying the temperature of the temperature control 95-135aboutWith the pressure of 0.45-1,30 MPa, the aging time of 2-4 hours, the Obtained results are presented in table. 1.

P R I m e R s 10, 11 (control). Experiments are performed as in example 1. Temperature temperature 95aboutWith the pressure of 0.45 MPa, time, temperature, respectively, 1.0 and 5.0 hours, the Obtained results are presented in table. 1.

P R I m e R s 12, 13 (control). Experiments are performed as in example 1, varying the time of incubation. The results are shown in table. 1.

P R I m e R 14 (control). Temperature control is carried out at 95aboutC for 4 h, but at a pressure of 0.35 MPa.

The resulting methanol in which the content of iron compounds is 1.12 10-5% of which volatile compounds of iron are 0,66 10-5% (compare with example 8).

P R I m e R 15 (comparative). Methanol is a raw example 1 thermostatic at a temperature of 95aboutC at a pressure of 0.35 MPa for 4 h, and then passed through a cation exchange resin KU-2 with a bulk velocity of 3 h-1at a temperature of 50about(In the conditions of example 18.with. N 1640135).

-1at a temperature of 50about(In the conditions of example 12.with. N 1640135).

The results of examples 14-16 are shown in table. 1.

The purified methanol raw was used as raw material in the process of producing formaldehyde by oxidative dehydrogenation of methanol.

The results of the tests are presented in table. 2. The results show that methanol is a raw, stripped of iron compounds proposed method contains less iron compounds and purity of the raw material (methanol) has a significant influence on the activity of a silver catalyst in the oxidative dehydrogenation reaction, and therefore, the output of the formaldehyde. When using the crude methanol and purified by method proposed in response to receipt of formaldehyde release last for 400 hours of work catalyst is 90.5 mol.% at that time, as when using methanol, purified by the method described in the prototype, the release of formaldehyde during this same time is 76,0 mol.%.

The METHOD of PURIFICATION of CRUDE METHANOL FROM IRON COMPOUNDS by maintaining it at an elevated temperature, characterized in that methanol is raw as well the om.

 

Same patents:
Glycol purification // 2264377

FIELD: organic compound technology.

SUBSTANCE: invention relates to improved method of reducing content of aldehydes in ethylene glycol containing up to 2000 ppm aldehydes comprising bringing glycol in liquid phase into contact with solid high-acidic cation-exchange resin.

EFFECT: reduced content of aldehydes and improved transmission characteristics in UV region.

5 cl

Treatment of glycol // 2265584

FIELD: chemical technology.

SUBSTANCE: invention relates to removing impurities, such as aldehydes, from ethylene glycol aqueous solutions by treatment with bisulfite-treated strong-base anion-exchange resin. Invention describes a method for reducing the content of aldehydes in ethylene glycol aqueous solution containing about from 0.2 wt.-% to 20 wt.-% of ethylene glycol containing about from 80 wt.-% to 99.7 wt.-% of water and about from 100 mln-1 (mas.) to 0.1 wt.-% of aldehydes. Method involves contacting indicated solution with bisulfite-treated solid strong-base anion-exchange resin that before treatment with bisulfite comprises quaternary ammonium functional groups in hydroxide form. Invention provides the improvement in removing impurities, such as aldehydes, from flows of ethylene glycol aqueous solutions.

EFFECT: improved method for treatment.

2 cl, 1 ex

FIELD: chemical industry; method of production of the alkali-resistant and thermal-resistant polyols.

SUBSTANCE: the invention is pertaining to the improved method of production of the alkali- resistant and thermal-resistant polyols representing the sugar-alcohol syrups. The method provides for the following stages: hydrogenation of the hydrolysate of the corresponding polysaccharide with formation of the hydrogenated sugar-alcohol syrup, the alkaline and thermal treatment of the hydrogenated syrup for production of the stabilized sugar-alcohol syrup, refining of the stabilized sugar-alcohol syrup by its gating through, at least, one ion-exchange resin, in which the stabilized sugar-alcohol syrup is refined by means of its double gating through the cationic- anionic ion-exchange configuration (CACA) including, at least, the first weak-acid cationic ion-exchange resin and the second strongly-base, medium-base or weak-base anion-exchanging resin. The method allows to have the alkali-resistant and thermal-resistant polyols not having the shortcomings of the polyols of the previous level of the engineering.

EFFECT: the invention ensures production of the alkali-resistant and thermal-resistant polyols not having the shortcomings of the polyols of the previous level of the engineering.

18 cl, 3 ex, 1 dwg

FIELD: organic chemistry, biotechnology.

SUBSTANCE: invention relates to variants of a method for extraction of 1,3-propanediol from enzymatic broth. The first variant involves steps for contacting enzymatic broth containing water, 1,3-propanediol and at least one impurity chosen from glycerol, glucose and butanetriol with at least one extractant chosen from alkanols, ketones, esters, acids, ethers or vegetable oils to form the first mixture. Then the first mixture is separated for the first phase and the second phase wherein the first phase comprises the greater part of extractant and at least some amount of 1,3-propanediol from enzymatic broth in the mass ratio 1,3-propanediol to at least one component taken from glycerol, glucose or butanetriol in the first phase above the mass ratio 1,3-propanediol and the same impurity in enzymatic broth before contacting enzymatic broth with the extractant wherein the second phase comprises the greater part of water and at least some amount of impurity from enzymatic broth followed by extraction of 1,3-propanediol by separation of the first phase from the second phase, contacting the first separated phase with aqueous solution to form the second mixture, and separation of the second mixture for the third and forth phases wherein the third phase comprises the greater part of the extractant from the first phase, and wherein the fourth phase comprises 1,3-propanediol and the greater part of the first amount of the first amount of aqueous solution, and wherein the mass ratio in the forth phase of 1,3-propanediol to any presenting mixture is more as compared with the mass ratio of 1,3-propanediol to the same impurity in the enzymatic broth being before contacting the enzymatic broth with the extractant, and extraction of 1,3-propanediol, and separating the fourth phase from the third phase. Invention provides enhancing purity of 1,3-propanediol.

EFFECT: improved method of extraction.

30 cl, 15 tbl, 9 dwg, 10 ex

FIELD: chemistry.

SUBSTANCE: present invention relates to a method of processing filtrate wastes from production of pentaerythritol, containing (wt %): 32-37.81 sodium formate, 22-27 pentaerythritol, 10-11 cyclic monoformals, 2-3 dipentaerythritol, as well as pentaerythritol derivative impurities, to obtain technical pentaerythritol and sodium formate. The method involves treatment of the filtrate with an extraction agent, followed by separation and recycling of the obtained liquid and solid phases. Treatment is carried with water in water/filtrate ration equal to (0.5-1.0)/1 and temperature 15-25C, followed by taking the washed off residue to the evaporation and crystallisation step to obtain technical pentaerythritol and the filtrate solution for evaporation and crystallisation to obtain sodium formate.

EFFECT: efficient method of processing waste filtrate from production of pentaerythritol.

2 tbl, 1 ex

FIELD: chemistry.

SUBSTANCE: present invention relates to a method of extracting at least monopropylene glycol and/or dipropylene glycol from a mixture (C), containing water and said propylene glycols, involving (I) evaporation of the mixture in at least two evaporation and/or distillation steps while lowering working pressure of the evaporators and/or distillation columns to obtain a mixture (C') and a mixture (C"), where mixture (C") is further separated into a mixture (C-Ia), which contains at least 90 wt % water, a mixture (C-Ib) which contains less than 95 wt % water through reverse osmosis; (II) separation of mixture (C') obtained from (I) in at least one additional distillation step to obtain a mixture (C-I) which contains at least 70 wt % water, and a mixture (C-II) containing less than 30 wt % water, where mixture (C) contains 70-99.5 wt % water and 0.01-25 wt % of the said propylene glycols, mixture (C') contains 80-99.9 wt % water and 2.5-15 wt % of the said propylene glycols, and mixture (C") contains 90-99.99 wt % water and 0.01-0.5 wt % of the said propylene glycols.

EFFECT: high efficiency of extracting propylene glycol.

12 cl, 2 tbl, 2 ex

FIELD: chemistry.

SUBSTANCE: method involves selective extraction of neutral coniferous green extractive substances with solvents, hydrolysis and then column chromatography. A provitamin coniferous concentrate is placed on the column with silica gel and successively washed with ethyl alcohol with concentration of 82-85 vol. % and acetone, and the acetone fraction then undergoes hydrolysis and column chromatography.

EFFECT: simplification of the method.

4 ex

FIELD: chemistry.

SUBSTANCE: methanol regeneration method involves preheating a water-methanol solution, evaporating vapour of the water-methanol mixture by mixing with heated vapour containing water vapour, fractionating the vapour of the water-methanol mixture to separate methanol and the steam condensate. The water-methanol solution is heated with methanol vapour during condensation thereof in the fractionation apparatus, as well as the balance part of the steam condensate removed from the apparatus. The water-methanol mixture is evaporated in hydrocyclone separators in two steps with premixing of the water-methanol solution with water vapour before the first separation step, as well as isoenthalpic evaporation at the second separation step. Fractionation is carried out at low pressure in a three-section falling film fractionation column.

EFFECT: simple method, low metal consumption and continuity of the regeneration process.

1 dwg, 1 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing butanol, a compound which is industrially very important as a raw material of chemicals and pharmaceutical agents, as a solvent, and as a fuel material. The method comprises: step A, filtering a butanol-containing solution, obtained by microbial fermentation, through a nanofiltration membrane, and collecting butanol-containing solution from the permeate flow of said nanofiltration membrane; step B, filtering the collected butanol-containing solution through a reverse osmosis membrane to increase the butanol concentration for further separation of butanol phase from aqueous phase; step C, separation of butanol from the said butanol phase of step B.

EFFECT: high-purity butanol can be obtained using the proposed method.

10 cl, 2 dwg, 10 tbl, 15 ex

FIELD: chemistry.

SUBSTANCE: monoethyleneglycol is applied to prevent the formation of hydrates in gas-transporting pipelines, condensate and water. It can also contribute to the protection of the pipelines from corrosion. The claimed method includes the following stages: a) preparation of a water solution of monoethyleneglycol, which contains dissolved gas and salts of bi-charged cations, b) heating the water solution of monoethyleneglycol to obtain a heated mixture, which causes precipitation of, at least, a part of salts and release of, at least, a part of dissolved gas, in particular, carbon dioxide, c) separation of the released gas from monoethyleneglycol , d) separation of, at least, a part of precipitated salts from monoethyleneglycol, e) distillation of, at least, a part of water from the heated mixture to obtain hot dehydrated monoethyleneglycol. The first part of hot dehydrated monoethyleneglycol is directed back into the water solution of monoethyleneglycol, supplied from the stage (a), to obtain, at least, a part of heat for heating the water solution of monoethyleneglycol at the stage (b).

EFFECT: invention makes it possible to separate cations with the application of the simple and energy-preserving technology.

14 cl, 1 dwg, 1 ex

FIELD: technology for production of methanol from syngas.

SUBSTANCE: claimed method includes mixing of hydrocarbon raw material with water steam to provide syngas by steam conversion of hydrocarbon raw material and subsequent methanol synthesis therefrom. Conversion of hydrocarbon raw material and methanol synthesis are carried out under the same pressure from 4.0 to 12.0 MPa. In one embodiment hydrocarbon raw material is mixed with water steam and carbon dioxide to provide syngas by steam/carbonic acid conversion of hydrocarbon raw material in radial-helical reactor followed by methanol synthesis therefrom under the same pressure (from 4.0 to 12.0 MPa). In each embodiment methanol synthesis is carried out in isothermal catalytic radial-helical reactor using fine-grained catalyst with grain size of 1-5 mm. Methanol synthesis is preferably carried out in two steps with or without syngas circulation followed by feeding gas from the first or second step into gasmain or power plant.

EFFECT: simplified method due to process optimization.

12 cl, 3 tbl, 3 dwg

FIELD: organic chemistry, chemical technology.

SUBSTANCE: invention relates to the improved method for preparing methanol. Method involves the successive feeding hydrocarbon-containing gas, injection of chemically purified water, carrying out the preliminary steam reforming for preparing synthesis gas and carrying out the final reforming if formed gas with addition of oxygen under pressure for carrying out synthesis of methanol, heating reactor for preliminary reforming by flow of obtained synthesis gas going out from reactor for the final reforming that is fed to intertubular space of reactor for preliminary reforming followed by cooling synthesis gas obtained as result of reforming by vapor-gas mixture and carrying out synthesis of methanol in 2-step reactor. Cooling the reaction mixture for carrying out isothermal reaction for synthesis of methanol in intermediate external heat exchanger of two-step reactor is carried out with vapor-gas mixture and cooling flow going out from reactor for synthesis of methanol is carried out with vapor-gas mixture and chemically purified water. Also, invention relates to unit for preparing methanol including the source of hydrocarbon-containing gas and unit for complex preparing gas, reactor for preliminary vapor reforming heated with flow going out from reactor for final reforming, two-step reactor for synthesis of methanol, heat exchangers for cooling synthesis gas, heat exchangers for cooling flow going out from reactor for synthesis of methanol, separator for separation of reaction products and exhausting gases and crude methanol. The unit for preparing methanol is assembled with unit for complex gas preparing including block for preparing chemically purified water, block for preparing raw, additional manufacture involving torch making, cleansing constructions, sources of electric energy, air of control and measuring instruments and automatic equipment, chemical laboratory and operating block. Two-step reactor for synthesis of methanol joined with heat exchanger for cooling synthesis gas with vapor-gas mixture, intermediate external heat exchanger for cooling the reaction mixture with vapor-gas mixture is joined in-line with heat exchanger for cooling flow obtained in reactor with vapor gas mixture, heat exchanger for cooling of chemically purified water and separator for separation of reaction products. Ignition device is assembled in reactor for final reforming that promotes to carry out the start of unit without trigger furnace. Water is injected in flow hydrocarbon gas directly before heat exchanger for the reaction mixture that provides excluding boiler-utilizer and trigger boiler from schedule and to solve the problem for cooling the reaction mixture in reactor for synthesis of methanol also. Based on integration of the device for preparing methanol in technological schedule with unit for complex preparing gas and significant change of the conventional schedule for preparing methanol method provides 3-fold reducing capital investment.

EFFECT: improved method for preparing methanol.

2 cl, 1 dwg

FIELD: organic chemistry, chemical technology.

SUBSTANCE: method for synthesis of methanol involves the following stages: removing hydrocarbon gas to be processed, sulfur elimination, catalytic steam conversion to obtain converted gas, heat utilization with separation of water, synthesis of methanol and separation of condensed methanol. Hydrocarbon gas with unstable composition is removed under pressure 0.001 MPa, not less, and sulfur elimination of hydrocarbon gas with unstable composition is combined with stage of step-by-step stabilization of pressure to form steam-gaseous mixture. Methanol synthesis is carried out for at least two successive flow steps with reducing volume of catalyst under pressure 1.5 MPA, not less, and separation of methanol between successive stages. Method provides significant reducing cost of gas processing and service of devices and allows carrying out the processing in mobile traveling devices in field conditions. Invention can be used in processing gas with unstable composition, for example, casing-head petroleum gas in petroleum-extracting holes, in field conditions in small traveling devices.

EFFECT: improved preparing method.

2 cl, 2 dwg

FIELD: organic chemistry, chemical technology.

SUBSTANCE: invention relates to a new method for preparing methanol and other aliphatic alcohols by gas-phase interaction of hydrocarbon gases with water vapor under effect of ultraviolet radiation. Methanol and other aliphatic alcohols are prepared by direct hydroxylation of hydrocarbon gas or mixture of hydrocarbon gases with water vapor. For this aim hydrocarbon gas and vapor or mixture of gases and vapor are fed into reactor wherein the reaction mass is subjected for effect of ultraviolet radiation in wavelength range 240-450 nm at temperature lower vapor formation point. The end product is isolated from vapor-gaseous mixture by condensation and unreacted gas or mixture of gases removed from the reaction zone is purified from the end product by bubbling through water layer and recovered into reactor by adding the parent gaseous component in the amount equal to consumed one. The process is carried out for a single stage and can be realized under atmosphere pressure. Invention can be used in chemical, petroleum chemical, petroleum processing and petroleum and gas extracting industry.

EFFECT: improved preparing method.

2 cl, 1 tbl, 8 ex

FIELD: industrial organic synthesis.

SUBSTANCE: invention relates to improved process of producing methanol from purge gas produced in basic methanol or ammonia synthesis. Process comprises dispensing compressed carbon dioxide into basic synthesis purge gas, heating resultant gas mixture to starting synthesis temperature, passing thus heated gas through methanol synthesis catalyst, cooling reacted gas, recovering condensed crude methanol, and separating non-condensed gas stream into return stream and purge stream, the former being designed for mixing with basic synthesis purge gas stream and passed to one or two circulation jet compressors. Circulation is effected by energy provide either by (i) pressure of basic synthesis purge gas, which is supplied to jet compressor and further dispensed into compressed carbon dioxide stream, or by (ii) pressure of compressed carbon dioxide, which is dispensed into jet compressor and then introduced into basic synthesis purge gas stream, or by (iii) pressure of basic synthesis purge gas and pressure of indicated compressed carbon dioxide, both being supplied to one or two jet compressors. Ammonia or methanol production purge gas is successfully used for production of methanol without utilizing additional hydrogen-containing streams.

EFFECT: reduced methanol production cost.

4 cl, 5 dwg, 1 tbl, 4 ex

FIELD: industrial organic synthesis catalysts.

SUBSTANCE: invention relates to copper-containing catalysts for low-temperature synthesis of methanol in fluidized bed at median pressure and provides catalyst, whose preparation involves impregnation and which contains oxides of copper, zinc, chromium, magnesium, aluminum, boron, and barium and has following molar ratio: CuO:ZnO:Cr2O3, MgO:Al2O3:B2O3:BaO = 1:0.3:(0.014-0.038):(0.047-0.119):(0.05-0.1):(0.007-0.014):(0.0292-0.054).

EFFECT: increased mechanical strength and wear resistance of catalyst.

1 tbl

FIELD: industrial organic synthesis catalysts.

SUBSTANCE: invention relates to copper-containing catalysts for low-temperature synthesis of methanol in fluidized bed at low pressure and provides a wear-resistant catalyst, whose preparation involves impregnation and which contains oxides of copper, zinc, chromium, magnesium, aluminum, and boron and has following molar ratio: CuO:ZnO:Cr2O3, MgO:Al2O3:B2O3 = 1:0.3:(0.15-0.2):(0.1-0.025):(0.25-0.3):(0.08-0.1).

EFFECT: increased mechanical strength and wear resistance of catalyst.

1 tbl

FIELD: industrial organic synthesis catalysts.

SUBSTANCE: invention relates to copper-containing catalysts for low-temperature synthesis of methanol in fluidized bed at high pressure and provides catalyst, whose preparation involves impregnation and which contains oxides of copper, zinc, chromium, magnesium, aluminum, boron, and barium and has following molar ratio: CuO:ZnO:Cr2O3, MgO:Al2O3:B2O3:BaO = 1:(0.7-1.1):(0.086-0.157):(0.05-0.15):(0.125-0.2):(0.018-0.029):(0.04-0.075).

EFFECT: increased mechanical strength and wear resistance of catalyst.

1 tbl

FIELD: industrial organic synthesis and chemical engineering .

SUBSTANCE: invention relates to a process of producing liquid oxygenates, including methanol, C2-C4-alcohols, formaldehyde, lower organic acids, or mixtures thereof, and to installation for implementation the process. Process comprises successively supplying natural gas from complex gas preparation plant to a series of "gas-gas" heat exchangers and into annular space of at least one tubular reaction zone of reactor, wherein natural gas is heated to temperature of the beginning of reaction, whereupon heated gas is passed to the entry of the tubular reaction zone mixer, into which compressed air or oxygen is also injected to provide gas-phase oxidation in reaction zone of reactor. Resulting reaction mixture is discharged from reactor into a series of "gas-liquid" and "gas-gas" heat exchangers, wherein reaction mixture is cooled to ambient temperature and sent to separator, wherefrom liquid phase is passed through lower carboxylic acid recovery vessel to the system of rectification columns to isolate the rest of mixture components, whereas leaving gas is recycled to complex gas preparation plant. More specifically, oxidation is carried out within temperature range 240 to 450°C and pressure from 2 to 10 MPa at residence time of reaction mixture in reactor 2-6 sec and oxidant concentration 2 to 15 wt %. In reactor having mixers hollow and at least one tubular reaction zones, required temperature is maintained constant throughout all length of tubular reaction zone and at entries for compressed air or oxygen in mixers of each of tubular reaction zones and hollow reaction zone. Liquid oxygenate production plant is composed of aforesaid complex gas preparation plant, a series of "gas-gas" heat exchanger to heat natural gas, reactor, a series of "gas-liquid" and "gas-gas" heat exchangers to cool reaction mixture obtained in reactor, gas-liquid separator, lower carboxylic acid recovery vessel, and system of rectification columns to isolate the rest of products.

EFFECT: enabled implementation of the process directly near gas and gas condensate deposits, increased conversion of methane per one passage through reactor, and increased yield of oxygenates due to improved design of plant.

6 cl, 1 dwg, 1 tbl

FIELD: chemical industry; methods of production of hydrogen and a methanol.

SUBSTANCE: the invention is pertaining to the method of production of the industrial hydrogen and methanol from the converted gas consisting mainly of CO2, H2. The method of production of hydrogen and methanol from the converted gas containing carbon oxides and hydrogen includes the synthesis of methanol. For execution of the methanol synthesis feed the converted gas with the volumetric ratio of H2-CO2/CO+CO2, equal to 2.03-5.4, which is conducted in the reactor system including the flow reactor or the cascade of the floe reactors and / or the reactor with the recycle of the gas mixture with production of methanol, the unreacted gas and the blow-down gas. At that the mixture of the unreacted and converted gases is fed for purification from carbon carbon dioxide with its extraction and batch feeding of the carbon dioxide into the converted gas delivered for the synthesis of methanol. The blow-down gases are subjected to the fine purification from the impurities with production of hydrogen. The invention allows to upgrade the method due to maximum usage of the carbon dioxide.

EFFECT: the invention ensures improvement of the method of production of hydrogen and a methanol due to maximum usage of the carbon dioxide.

2 cl, 1 dwg, 1 tbl, 5 ex

Up!